* Patches by Anders Larsen, 17 Sep 2003:
- fix spelling errors
- set GD_FLG_DEVINIT flag only after device function pointers
are valid
- Allow CFG_ALT_MEMTEST on systems where address zero isn't
writeable
- enable 3.rd UART (ST-UART) on PXA(XScale) CPUs
- trigger watchdog while waiting in serial driver
diff --git a/cpu/pxa/serial.c b/cpu/pxa/serial.c
index c9d5f70..cedebfe 100644
--- a/cpu/pxa/serial.c
+++ b/cpu/pxa/serial.c
@@ -29,6 +29,7 @@
*/
#include <common.h>
+#include <watchdog.h>
#include <asm/arch/pxa-regs.h>
void serial_setbrg (void)
@@ -38,7 +39,7 @@
unsigned int quot = 0;
if (gd->baudrate == 1200)
- quot = 192;
+ quot = 768;
else if (gd->baudrate == 9600)
quot = 96;
else if (gd->baudrate == 19200)
@@ -53,7 +54,6 @@
hang ();
#ifdef CONFIG_FFUART
-
CKEN |= CKEN6_FFUART;
FFIER = 0; /* Disable for now */
@@ -82,9 +82,21 @@
BTIER = IER_UUE; /* Enable BFUART */
#elif defined(CONFIG_STUART)
-#error "Bad: not implemented yet!"
+ CKEN |= CKEN5_STUART;
+
+ STIER = 0;
+ STFCR = 0;
+
+ /* set baud rate */
+ STLCR = LCR_DLAB;
+ STDLL = quot & 0xff;
+ STDLH = quot >> 8;
+ STLCR = LCR_WLS0 | LCR_WLS1;
+
+ STIER = IER_UUE; /* Enable STUART */
+
#else
-#error "Bad: you didn't configured serial ..."
+#error "Bad: you didn't configure serial ..."
#endif
}
@@ -109,13 +121,17 @@
{
#ifdef CONFIG_FFUART
/* wait for room in the tx FIFO on FFUART */
- while ((FFLSR & LSR_TEMT) == 0);
-
+ while ((FFLSR & LSR_TEMT) == 0)
+ WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
FFTHR = c;
#elif defined(CONFIG_BTUART)
- while ((BTLSR & LSR_TEMT ) == 0 );
+ while ((BTLSR & LSR_TEMT ) == 0 )
+ WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
BTTHR = c;
#elif defined(CONFIG_STUART)
+ while ((STLSR & LSR_TEMT ) == 0 )
+ WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
+ STTHR = c;
#endif
/* If \n, also do \r */
@@ -135,6 +151,7 @@
#elif defined(CONFIG_BTUART)
return BTLSR & LSR_DR;
#elif defined(CONFIG_STUART)
+ return STLSR & LSR_DR;
#endif
}
@@ -146,14 +163,17 @@
int serial_getc (void)
{
#ifdef CONFIG_FFUART
- while (!(FFLSR & LSR_DR));
-
+ while (!(FFLSR & LSR_DR))
+ WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
return (char) FFRBR & 0xff;
#elif defined(CONFIG_BTUART)
- while (!(BTLSR & LSR_DR));
-
+ while (!(BTLSR & LSR_DR))
+ WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
return (char) BTRBR & 0xff;
#elif defined(CONFIG_STUART)
+ while (!(STLSR & LSR_DR))
+ WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */
+ return (char) STRBR & 0xff;
#endif
}